Most consumers, in their individual experience, probably avoid foolish purchases like; buying a second widget immediately after buying a first widget.

But it's probably true that there are a lot of individuals out there who have done this (for whatever reason), and it's the statistical likelihood of people buying a second widget that drives this.

An individual who doesn't do this, can't perceive this "fact" of statistics, which is human behavior in-aggregate form. Individuals only perceive individual behavior.